easynightPortable Travel Blackout Blind, Shade (Extra Large 90 x 57)

how much trouble is it to put on and off a window? Like if I only wanted this on during my baby's naps, but wanted to take it down other times?

Can I get more of the suction cups with velcro?

How can I buy more of the Velcro that comes with it? I can’t find other options that peel off so cleanly and easily.

Are you supposed to cut it to fit your window? My window is 70 x 52, so the large size is little too large it.